Why does no disk icon appear in Windows Explorer when connecting a flash drive?

Windows Explorer has not refreshed after inserting the drive: Refresh the Windows Explorer by pressing the F5 key.

Drive is not fully inserted: Remove the TDK Life On Record Flash Drive from the USB port and then reinsert it.

All available drive positions are assigned: Reassign or move mapped drive locations to open up a position closer to the system hard drive. More information on drive letter assignment.